Coilpack System on Motor with Dizzy? Possibly?

**Sexc86** · 07-10-2007 11:21 PM

Thanks for all the replys. For what i have found so far (reading not personal experience) isthe honda oem coils are weak at high rpm and boost, dont have enough time to recharge to 100% strength compared to at lower rpm. This in theory could rob you of power and even cause a missfire.

However i too have spoken to many creditable people on this topic. Some have said compelte waste of time others said its absolutely essential to a all out build. i know i will be mofidying my ignition some how, but not sure to what extent yet.

**Limbo** · 07-10-2007 11:50 PM

i've gone and got a MSD coil kit also. Its coming from the states so i'll let you know if i notice any difference

**Sexc86** · 08-10-2007 06:56 AM

really what box and coil are you going with?

**dsp26** · 08-10-2007 11:00 AM

beeza: so as to not waste your money yet... do the build then do a dyno run.
you will notice HINTS of ignition breakdown on the curve when it gets noticably jagged instead of a smooth curve.

benjaamin: I only half agree that even coil upgrades don't do much, but the people who do install it on mild setups dont utilise it properly. sure on my setup as is now I don't/won't need it, but with increased spark current, I am able to take advantage of it by increasing my plug gap. As is now i am running 1.7mm gaps on my iridiums all the way to 9krpm.
I have seen dyno proven gains on many NA applications but it is not high rpm where it gains, the peak 4wkw gain i managed on my sr20 was in the midrange. by increasing the spark gap and taking advantage of the coil, it resulted in a better burn also backed up by slight A/F leaning in the area, which is when i also increased fuel pressure a tad...so i could say the coil didn't directly add performance but there are ways of 'tuning'.. or should i say tweaking a cars performance without touching the ecu... a combination of good parts goes a long way as all should know.

**beeza** · 08-10-2007 12:18 PM

How big of a spark plug gap can or should I be running on mine?

**dsp26** · 08-10-2007 01:13 PM

Originally Posted by beeza

How big of a spark plug gap can or should I be running on mine?

don't know... as theres other variables like cylinder pressure during compression yada yada...

not recommending my method and i suggest you don't, but i was pushing mine in 0.2mm increments using gapping tool and verniers until i came to a happy 1.7mm gap and 17* timing & 36psi fuel pressure with no ping.

get the car moving slightly on slight incline and putting WOT on 5th gear... you will feel it misfire.... once again NOT RECOMMENDED.

If you really must, set it to 1.3mm during summer... if theres no sign of ping, increase it to 1.5mm.

on another note, the factory coil managed to run my plugs at 1.3mm with only slight misfire at 4th gear load in mid rpm.

DISCLAIMER: my methods above are risky and are a guide only, i knew what i was doing as i've done it a few times to a few different cars but there are risks invovled in forcing ping/misfire in your car. the ones i did to mine and friends cars were tweaked back to back on dynos... my curernt setup on the b16a2 hasn't, event hough it 'feels great' singing to 9krpm, i can't tell if theres even the slightest ignition breakdown and can't tell you till i dyno again.